Fitting for conduit construction



Oct. 6, 1942. c 2,297,979

FITTING FOR CONDUIT CONSTRUCTION Filed Sept. 18, 1940 V INVENTOR. Rossnr L. Pee/r.

Mad-7 M ATTORNEYS.

Patented Oct. 6, 1942 FITTING FOR CONDUIT CONSTRUCTION Robert E. Peck, Cincinnati, Ohio, assignor of onefourth to William Burchenal and one-fourth to Morss Lippincott, both of Cincinnati, Ohio Application September 18, 1940, Serial No. 357,303

5 Claims.

This invention relates to fittings for conduit construction and to a particular type of construction for incorporating vanes adjacent the angular juncture of the fittings.

In my Patent No. 2,216,046, I have disclosed a construction in air conditioning conduit fittings wherein the fitting comprises two elements each having inner and outer sections and each having an end edge extending diagonally of its length, the edges fitting together to form a desired angle fitting and with air directing vanes secured along the meeting edges of the inner sections to direct air currents through the fitting. Conduit of a type adapted for use with the inventions herein disclosed is described and claimed in my Patent No. 2,226,523, entitled Conduit construction. Further, in my application Serial No. 308,591 filed December 11, 1939, I have shown improvements in such air conditioning conduit fittings and a method of construction thereof wherein a length of duct is cut diagonally to provide two sections adapted to be fitted one against the other at their diagonally cut faces to form a miter joint, and then fastening one of the severed sections to the other by securing each section to air direction vanes extending across the miter line at the interior of the sections.

My invention, as set forth herein, relates to improvements in air conditioning conduit fittings wherein the diagonal line of juncture of the inner sections is a broken line, and wherein permanent attachment of the air direction vanes and the positioning of the vanes is accomplished by means of cleats secured to the vanes and mounted on that inner section which has a tongue or portion extending beyond the true diagonal line of the meeting sections, and whereby the correct positioning of the vanes can be accomplished without a tedious aligning operation.

It is further my object to provide a conduit fitting having greatly improved rigidity and increased structural strength.

The foregoing objects and other objects to which reference will be made in the ensuing disclosure, I accomplish by that certain combination and arrangement of parts of which I have shown a preferred embodiment. Referring to the drawing:

Figure 1 shows an end elevation of the inner conduit section.

Figure 2 is a vertical section through the joint.

Figure 3 is an enlarged diagonal sectional view taken along the lines 3-3 in Figure 2.

Figure 4 is a detail perspective view of a preferred type of vane holding clamp or cleat.

Figure 5 is a perspective view of a preferred type of vane;

Figure 6 is a perspective View of one of the inner conduit sections which forms the out-ofregistry joint in the fitting.

Referring to Figures 1 to 3 the outer section of conduit material is composed of two pieces of tubular conduit material I and 2 joined along a diagonal line 3 to form a right angle elbow fitting. The inner section of the conduit material which is telescoped within the outer sections is composed of the two elements 4 and 5 of such size and shape as to be received snugly within the outer element composed of the pieces 1 and 2. The inner sections 4 and 5 are joined at their ends by the registry of the diagonally cut edges 6. The meeting line between the inner sections, however, extends only a short distance in regisry with the meeting line between the outer sections as the section 5 has a cut out portion 7 and the section 4 has a tongue or extension 8 which is received within the cut out portion 1 of the section 5.

It will be obvious that the joint is thus formed by inner and outer sections wherein the juncture lines are broken so that structurally the inner section provides the outer section with much greater support than there would be if the line of juncture between the inner sections and the outer sections was in registry.

The tongue or extension 8 extending from the inner section 4 provides the means by which vanes 9 may be positioned accurately and rigidly prior to the assembly of the fittings.

The vanes 9 are formed from layers of asbestos paper or other waterproof and preferably fireproof material wound about a form of the desired shape and adhesively secured together to make a substantially rigid structure. The ends are open and the edges of the end walls receive cleats with which the vanes are mounted in position.

The cleat illustrated is formed of metal and has a central portion In provided with a hole ll roughly pierced through the metal so that the edges adjacent the hole will act as threads for receiving the threads of a screw with which the cleat is secured in position.

The cleat illustrated has upstanding walls [2 and I3 bent at substantial right angles to the portion ID. The upstanding wall l2 has return bent tongues I4, l5 providing channeled openings l6, H which receive the back walls 18, I9 of the vanes 9.

The front wall l3 has a return bent tongue 20 forming a channel which receives the curved front wall 2| of the vane 9. As illustrated in Figures 2, 3 and 6, the cleats are mounted at each end of each vane. Holes 22 are drilled in the tongue 8 along the true diagonal line extended from the line 6, and as illustrated in Figure 6, all that it is necessary to do is to insert screws 23 through the openings II in the cleats and turn the screws down tight. Such action draws the parts together in a very rigid assembly.

To form the elbow fitting, the section 4 first has the vanes 9 mounted in desired position and the screws 23 are turned down to hold the vanes rigidly in position. The section 5 is then moved nto position with its cut out portion I registering with the extension 8 of the section 4. The outer sections l and 2 can then be moved into position. While it is customary to wrap tape 24 about the outer sections along the meeting diagonal juncture line, the importance of this reinforcement is minimized.

I have even found that if the walls of the inner sections 4, 5 are sufl'iciently thick and rigid, conduit fittings can be made in which the use of outer sections is entirely eliminated. Thus the use of a broken line of juncture between inner sections, particularly with the preferred arrangement which I have described, for mounting the vanes provides a structure which is substantially self-sustaining and which requires only the securing of tape along the meeting edges of the fitting to make it air tight.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A conduit angle fitting comprising a hollow tubular outer member and a hollow tubular inner member telescoping within the outer member, each member being composed of complementary sections, the inner member having one section with a portion on each side extended beyond its line of juncture at the sides of said portion with its complementary section, and the complementary section having a cut away portion registering with said extending portion to form a broken joint out of registry with a miter joint between the sections composing the outer member, a series of air deflecting vanes mounted on the extending portion of the inner section and aligned at the miter joint between the sections forming the outer member.

2. A conduit angle fitting comprising a hollow tubular outer member and a hollow tubular inner member telescoping within the outer member, each member being composed of complementary sections, the sections forming the outer member having a miter joint and the sections forming the inner member having a miter joint at the ends with a tongue and groove joint between the ends of the joint, and a series of air deflecting vanes mounted on said tongue in alignment with the miter joint between the sections forming the outer member.

3; A conduit angle fitting composed of hollow tubular sections having a tongue and groove joint at the meeting edges of the sections, a series of air deflecting vanes mounted on the tongue portion of said joint, and means securing said vanes to opposed walls of the section having the tongued portion of the joint, comprislng metal cleats secured at end edges of the vanes, and means extending through said opposed walls secured in said cleats.

4. A conduit angle fitting composed of hollow tubular sections having a tongue and groove joint at the meeting edges of the sections, a series of air deflecting vanes mounted on the tongue portion of said joint, means securing said vanes to opposed walls of the section having the tongue portion of the joint, comprising cleats secured to the end edges of the vanes, and means extending through said opposed walls secured in said cleats.

5. A conduit angle fitting composed of hollow tubular sections having a tongue and groove oint at the meeting edges of the sections, a series of air deflecting vanes mounted on the tongue portion of said joint, means securing said vanes to opposed walls of the section having the tongue portion of the joint, comprising cleats secured to the end edges of the vanes, and means extending through said opposed walls secured in said cleats, said means and said cleats being so contructed and arranged that the securing of said cleats secures the parts together in a rigid assembly. 

